Allow Empty Subject Thunderbird Extension

My wife likes to email me urls, but doesn't like to have to type a subject. The new Thunderbird 2.0 pops up a warning dialog when you leave the subject blank and does not provide a way to turn this warning off. This extension simply disables the empty subject line warning.

Operating System: Thunderbird 2 Extension
Price: Free
Web Site: https://addons.mozilla.org/en-US/thunderbird/addon/305

Tags: thunderbird 2, thunderbird extension, allow empty subject, email